I started playing this game as a warlock, all of my nice gear is on my warlock, my main is a warlock, and it's what I rolled.
The issues I have are the following:
1) I don't know why NCSoft saw fit to give other classes the Soul Burn. It's the only reason anyone ever wanted a Warlock in their group. Furthermore, they gave it to a class that commonly initiates engagement (Warden), and it feels as if the Warden's ability to initiate it is quicker than for the Warlock; like one key hit and boom it's on. While the Warlock can attain Black Wing, and with some soul shields have additional boosts to his Soul Burn... you can not explain this to some cocky Warden in your group; their Soul Burn is part of their rotation, and it doesn't matter that their boosts aren't as good as yours. I just went through this trying to explain to a lowbie Warden that my Soul Burn was more powerful, he just claimed I was jealous. He didn't even have Black Wing; none of his badges were legendary, his soul shields were crap.
2) DPS is dismal, absolute garbage. Even with a bad rotation, crappy skill rotation even, it shouldn't be as horrible as it is. Even doing spiders in the moon refuge, it feels like breathing through a straw. You can perceive how fast you're burning down the monsters, and everyone else accelerates far faster than I do. ANY other person hitting the same spider, I can tell they are out dps'ing me by a lot; my contributions are negligible. This follows in raids and in dungeons. The most DPS I have ever achieved is a couple thousand over 1million per second. Mostly, I just average around 300-500k per second. Again, I perhaps could try to work on my rotation, as this is always the excuse in all games about people complaining about their DPS. However, even in top tier dungeons everyone knows, Warlocks have nothing to contribute, so if the nerds and spreadsheet crunchers are coming to similar conclusions... something is definitely wrong.
There seems to be a general agreement, from subreddits on Reddit, to Youtube videos, forums and faction chat in-game... any other class can have half the gear of the Warlock and easily out DPS him without requiring a difficult and tuned skill rotation scheme.
NCSoft this is ridiculous. No one should have SB but the Warlock. And you have to do something about the DPS. I'm convinced, if you straight up doubled the DPS stats for all skills, the class would still lag behind in DPS. It's ridiculous.
I have no choice to stick with the Warlock, I'm too vested at this point. I have another character, but I just use him to store some Hongmoon stones and stuff. The class is so gimped, I don't really feel I contribute much to any group. I'm HM 19 close to HM 20, I believe I'm decently geared, and I have to say, I wouldn't be surprised if there's a lot of HM 15s out there that can out DPS my character.
I'm not left with much incentive to continue playing, other than very personal objectives of finishing dailies. This isn't good for your player base.